#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
char* my_strcpy (char* arr1,const char* arr2)
{
	char* ret = arr1;
	assert(arr1 != NULL);
	assert(arr2 != NULL);
	while(*arr1++ = *arr2++)
	{
	    ;
	}
    return ret;
}
int main ()
{
	char arr1 [] = "********************";
	char arr2 [] = "hello world";
	printf("%s\n",my_strcpy(arr1,arr2));
    return 0;
}